US President Donald Trump has published an expletive-laden post on social media in which he threatened to destroy Iran's power plants and bridges if it failed to meet his Tuesday deadline to reopen the Strait of Hormuz to all shipping.

He repeated an earlier threat to unleash "hell" but told US media there was a "good chance" of a deal being reached with Tehran.

Iran mocked his ultimatum, dismissing it as "helpless, nervous and stupid".

Trump's new threat came after he announced that the second crew member of a US fighter jet downed over Iran had been successfully rescued in an operation deep inside hostile territory.

Both the US and Iran had scrambled to locate the US serviceman in a mountainous region of south-western Iran. The pilot of the F-15 had been recovered shortly after the aircraft was shot down on Friday.

The incident came after more than a month of war, as Iran continued to respond to US and Israeli air strikes with attacks on Gulf nations allied to the two countries.

Iran has also significantly impeded transit in the Strait of Hormuz, a vital shipping lane through which about a fifth of the world's oil and gas normally passes, leading to skyrocketing global oil prices and fears of higher inflation around the world.

The disruption led Trump in March to announce a series of deadlines for Iran to reopen the strait. On Sunday he took to his Truth Social platform to reaffirm this demand.

The paragraph below contains very strong language.

He said: "Tuesday will be Power Plant Day, and Bridge Day, all wrapped up in one, in Iran. There will be nothing like it!!! Open the Fuckin' Strait, you crazy bastards, or you'll be living in Hell - JUST WATCH! Praise be to Allah. President DONALD J. TRUMP"

Afterwards, he told Fox News there was a "good chance" a deal would be reached on Monday, but he was considering "blowing everything up and taking over the oil" if a deal to end the war was not reached quickly.

Later, the US president posted again - "Tuesday, 8:00 P.M. Eastern Time!" - an apparent extension of the deadline originally meant to expire on Monday, 6 April.

Trump has postponed deadlines for the reopening of the Strait of Hormuz several times.

On 21 March, Trump initially threatened to "obliterate" Iran's power plants if the Strait of Hormuz was not "FULLY OPEN" within 48 hours.

Two days later, he said he would not launch strikes for another five days - until 28 March - while "good" and "productive" talks with Iran continued. Iran denied any contact between its officials and the Trump administration had taken place.

As that date approached, Trump again delayed the deadline by a further 10 days, until 6 April. This is the date that the new 48-hour deadline has been extended from.

Gen Ali Abdollahi Aliabadi of Iran's central military command said Trump's threat was a "helpless, nervous, unbalanced and stupid action", adding that "the gates of hell will open" for the US leader.

Meanwhile, Israel has attacked civilian Iranian infrastructure sites - a petrochemical facility on Saturday was the latest - and it was waiting for US approval to strike more energy facilities next week, according to defence officials.

US-Israeli strikes also hit the Qasem Soleimani international airport in south-western Iran on Sunday.

Iran has continued to fire drones and missiles at Israel and US Gulf allies.

A residential building in the Israeli city of Haifa was hit directly by a ballistic missile on Sunday. Four people were injured.

Earlier in the day, authorities in Abu Dhabi said they were battling fires at a Borouge petrochemical facility caused by falling debris from an Iranian missile.

Kuwait said strikes by Iranian drones had severely damaged oil and petrochemical facilities. Industrial and fuel plants were also targeted in Bahrain.

The operation to extract him from the ground in hostile territory was hugely complex and involved multiple US government agencies.

The US has rescued the missing crew member of the US F-15 fighter jet which was shot down over southern Iran.

The recovery of the airman follows separate search efforts by both the US and Iran.

One elderly couple had to find ยฃ1,000 for an oil delivery and suppliers are not giving quotes, a councillor says.

Iran rejected Donald Trump's ultimatum for a deal to re-open the Strait of Hormuz whose closure has led to a spike in oil prices.